Numbers' basic work area is a sheet, much like any other spreadsheet app. But that sheet is (potentially) blank when you start; it's not filled with a grid of rows and columns. You then add tables to the sheet, and each table can have its own associated style. So instead of having a workbook filled with a collection of sheets, a Numbers document consists of any number of sheets, each of which can then have any number of tables on that sheet.

Check out Griffiths' full review of how Numbers deals with those tables and handles templates, charts and Excel compatibility. Any lifehackers deep into the new iWork? Tell us what you think about it in the comments.